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Registro Completo |
Biblioteca(s): |
Embrapa Instrumentação. |
Data corrente: |
15/04/2020 |
Data da última atualização: |
11/12/2024 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
PUPPIN, L. G.; KHALID, M.; SILVA, G. T. T.; RIBEIRO, C.; VARELA, H.; LOPES, O. F. |
Afiliação: |
CAUE RIBEIRO DE OLIVEIRA, CNPDIA. |
Título: |
Electrochemical reduction of CO2 to formic acid on Bi2O2CO3/carbon fiber electrodes. |
Ano de publicação: |
2020 |
Fonte/Imprenta: |
Materials Research Society, n. 35, v. 3, 2020. |
Páginas: |
272 - 280 |
DOI: |
10.1557/jmr.2020.16 |
Idioma: |
Inglês |
Conteúdo: |
Electrochemical reduction of CO2 to formic acid is a good strategy to address both environmental and energy issues. However, some drawbacks including low activity, selectivity, and stability of electrocatalysts must be overcome. We propose a method for tailoring Bi 2 O 2CO 3 -coated carbon fiber electrodes with higher selectivity and stability for electrochemical CO 2 reduction to formic acid. We evaluated the effect of Bi 2 O 2CO 3 and Nafion contents on the electrocatalysts performance for CO 2 reduction reaction (CO 2RR). All electrodes produced only HCOO− in the liquid phase with a maximum faradaic efficiency (FE) of 69%. The electrocatalysts were stable under 24 h of continuous CO 2 RR operation. The FE increased with the increasing electrolyte concentration and cation radius size, which indicates that the anion stabilization in solution is critical for adequate formate generation. The CO 2 RR mechanism was proposed with basis on the literature. The structural carbonate of Bi2 O 2 CO3 acts as an intermediate species in the formate production from CO 2. |
Palavras-Chave: |
Energy production; Metallic electrocatalysts; Organic pollutant degradation. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01771naa a2200241 a 4500 001 2121669 005 2024-12-11 008 2020 bl uuuu u00u1 u #d 024 7 $a10.1557/jmr.2020.16$2DOI 100 1 $aPUPPIN, L. G. 245 $aElectrochemical reduction of CO2 to formic acid on Bi2O2CO3/carbon fiber electrodes.$h[electronic resource] 260 $c2020 300 $a272 - 280 520 $aElectrochemical reduction of CO2 to formic acid is a good strategy to address both environmental and energy issues. However, some drawbacks including low activity, selectivity, and stability of electrocatalysts must be overcome. We propose a method for tailoring Bi 2 O 2CO 3 -coated carbon fiber electrodes with higher selectivity and stability for electrochemical CO 2 reduction to formic acid. We evaluated the effect of Bi 2 O 2CO 3 and Nafion contents on the electrocatalysts performance for CO 2 reduction reaction (CO 2RR). All electrodes produced only HCOO− in the liquid phase with a maximum faradaic efficiency (FE) of 69%. The electrocatalysts were stable under 24 h of continuous CO 2 RR operation. The FE increased with the increasing electrolyte concentration and cation radius size, which indicates that the anion stabilization in solution is critical for adequate formate generation. The CO 2 RR mechanism was proposed with basis on the literature. The structural carbonate of Bi2 O 2 CO3 acts as an intermediate species in the formate production from CO 2. 653 $aEnergy production 653 $aMetallic electrocatalysts 653 $aOrganic pollutant degradation 700 1 $aKHALID, M. 700 1 $aSILVA, G. T. T. 700 1 $aRIBEIRO, C. 700 1 $aVARELA, H. 700 1 $aLOPES, O. F. 773 $tMaterials Research Society$gn. 35
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